Mailing-List: contact cygwin-help@sourceware.cygnus.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@sources.redhat.com Delivered-To: mailing list cygwin@sources.redhat.com From: Chris Faylor Date: Sat, 30 Sep 2000 22:04:25 -0400 To: cygwin@sources.redhat.com Subject: Re: Console output oddity Message-ID: <20000930220425.A3707@cygnus.com> Reply-To: cygwin@sources.redhat.com Mail-Followup-To: cygwin@sources.redhat.com References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.6i In-Reply-To: ; from bones0_list@hotmail.com on Sun, Oct 01, 2000 at 03:17:15AM +0200 On Sun, Oct 01, 2000 at 03:17:15AM +0200, Jonas Jensen wrote: >>I have noticed a very odd behaviour when I am sending a large amount of >>output to the console screen. >>If I "cat" a large text file in a bash window it takes about 20 times >>longer than if I "type" the same file in a DOS window. If I press and >>hold down the CONTROL, SHIFT or ALT key as soon as the "cat" is started >>then it runs about 4 times as fast. (If I hold the key down while >>starting the "cat" it runs at the lower speed but the speed increases >>if I release the key and then press it again.) A simple C program which >>just loops printing a counter to stdout can be speeded up by a factor >>of about 4 by holding down a key while it runs. It can be speeded up >>by a factor of about 20 by compiling it with the "-mno-cygwin" switch. >>Can anyone offer an explanation? > >I reported this problem some time ago, I think the topic was called >"printf is faster when piped through tee". I can't reproduce the >effects you talk about when holding a key, on my system (W2k) cat is >actually marginally faster than type. The C program that you can speed >up with -mno-cygwin can get almost the same speed increase if piped >through cat or tee. > >AFAIK, the problem was never fixed -- "Patches are Gratefully >ConsideredT", but I can't fix it and nobody else seems to care... I would certainly care to have any patch that speeds up any aspect of Cygwin. However, if you are referring to slowness when using the CYGWIN=tty setting, then you should notice considerable speedups in recent cygwin snapshots. cgf -- Want to unsubscribe from this list? Send a message to cygwin-unsubscribe@sourceware.cygnus.com